ICD-9 Diagnosis Code 333.1

Tremor NEC

Diagnosis Code 333.1

ICD-9: 333.1
Short Description: Tremor NEC
Long Description: Essential and other specified forms of tremor
This is the 2014 version of the ICD-9-CM diagnosis code 333.1

Code Classification
  • Diseases of the nervous system (320–359)
    • Hereditary and degenerative diseases of the central nervous system (330-337)
      • 333 Other extrapyramidal disease and abnormal movement disorders

Information for Medical Professionals

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The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.

  • Darkness tremor
  • Dystonic tremor
  • Early onset cerebellar ataxia with essential tremor
  • Essential tremor
  • Hereditary essential tremor
  • Intention tremor
  • Isolated facial tremor
  • Isolated head tremor
  • Isolated vocal tremor
  • Medication-induced postural tremor
  • Metallic tremor
  • On examination - intention tremor
  • On examination - tremor of tongue
  • On examination - tremor outstretched hands
  • Progressive cerebellar tremor
  • Saturnine tremor
  • Toxic tremor
  • Tremor opiophagorum

Index of Diseases and Injuries
References found for the code 333.1 in the Index of Diseases and Injuries:

Information for Patients


Tremors are unintentional trembling or shaking movements in one or more parts of your body. Most tremors occur in the hands. You can also have arm, head, face, vocal cord, trunk, and leg tremors. Tremors are most common in middle-aged and older people, but anyone can have them.

The cause of tremors is a problem in the parts of the brain that control muscles in the body or in specific parts of the body, such as the hands. They commonly occur in otherwise healthy people. They may also be caused by problems such as

  • Parkinson's disease
  • Dystonia
  • Multiple sclerosis
  • Stroke
  • Traumatic brain injury
  • Alcohol abuse and withdrawal
  • Certain medicines

Some forms are inherited and run in families. Others have no known cause.

There is no cure for most tremors. Treatment to relieve them depends on their cause. In many cases, medicines and sometimes surgical procedures can reduce or stop tremors and improve muscle control. Tremors are not life threatening. However, they can be embarrassing and make it hard to perform daily tasks.

NIH: National Institute of Neurological Disorders and Stroke

  • Essential tremor
  • Tremor
  • Tremor - self-care

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